x86: ftrace - simplify wait_for_nmi
Get rid of 'waited' stack variable. Signed-off-by: NCyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: NSteven Rostedt <srostedt@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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